Alfred d



(No Model.)

A. D. TYRRILL.

' CLOCK CASE.

No. 399,097. Patente Mar. 5-, 1889.

N PETERS, Photo-Lime UNITED STATES PATENT OFFICE.

ALFRED l). TYRRILL, OF NE\\' HAVEN, CONNECTICUT, ASSIGYOR TO THE XE\V HAVEN CLOCK COMPANY, OF SAME PLACE.

CLOCK=CAS E.

SPECIFICATION forming part of Letters Patent No. 399,097, dated March 5, 1889.

Application filed November 5, 1888. Serial No. 289,991, (No modeld To all 2072/0127] it may concern:

Be it known that I, ALFRED D. TYRRILL, of ,1 New Haven, in the county of New Haven and 1 State of Connecticut, have invented a new Improvement in'Clocks; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure l, a front view of the clock complete; Fig. 2, a side view of the same; Fig. 3, a rear view of the connection, the back turned to the open position to show the movement; Fig. 4,5111 inside view of the flange looking toward the front; Fig. 5, a view of the front portion of the case looking from the rear, the movement removed; Fig. 6, a front view of the movement with the dial attached and as removed from the case; Fig. 7, a side view of the same; Fig. 8, ahorizontal section showing the movement as locked in the case.

This invention relates to an improvement in that class of clocks in which the movement is of circular shape and arranged within a sheetmetal case of corresponding circular shape. In the more general construction of this class of clocks the movement is secured in the case by screws through the back or sides, and the winding and set-ting device projects through the back of the case,and generally the dial is applied after the movement is introduced into the clock, and is secured independent of the movement, so that before the movement can be removed from the case it is generally necessary to detach the dial and pointers.

The object of my invention is to so 0011- struct the movement and attach it to the case that the movement as a whole, including the dial and pointers, may be removed or introduced without detachment of any of the parts, and also so that the pointing and setting devices may be entirely within the case; and the invention consists in a case composed of two parts, the division being in a plane at right angles to the axis of the case, the one part constituting the front and the other the back portions of the case, combined with the movement having its front plate constructed or provided with a flange of substantially the represented as attached.)

internal diameter of the case, and to which flange or plate the dial is secured, the said flange constructed with notches upon its edge and a cam-shaped surface running from said notches, the interior of the case provided with studs over which the said notches in the flange may pass as the movement is inserted from the rear of the case, and so that when so insorted the movement with the said flange may be rotated to bring the said cam-shaped surfaces against the said studs, and thereby removably interlock the movement wit-h the case, as more fully hereinafter described.

The caseis composed of two parts, A representing the front part, and B the rear part, the parts of circular shape, and the division is in a plane atright angles to the axis, the two parts hinged together, as at a, and preferably the shape of the two parts gives to the case a watch-like appearance. For convenience the case is provided with a ring, (I, by which the case may be hung or handled as a watch is hung or handled. The two parts are made from sheet metal struck to the required shape, and so that the back may be closed upon the front or opened like the back of a watch.

The movement iscomposed of a front plate, D, and rear plate, E, connected by posts, (see Figs. 7 and the mechanism being arranged between and on the plates in the usual manner, there being no novelty in the movement itself so far as this present invention is concerned. Upon the front plate of the movement a flange, F, is formed or attached, (here This flange corresponds in diameter to the internal diameter of the front portiomA, of the case. The edge of the flange is turned rearward, so that its outer surface, Z), is parallel with and so as to restagainst the inner surface of the case, as seen in Fig. 8. v

The dial-plate G is best secured to the flange F by means of tongues (I, cut from the flange, as seen in Figs. (3 and T, and which are closed down over the outer edge of the dial-plate G, as also seen in Figs. 6 and 7. The flange is best made separate from the plate D and secured thereto; but in any case it becomes substantially a part of the front plate.

Through the edge of the flange F, at one or more points, notches e are formed, (see Figs.

3 and 4,) the notches being represented as diametrically opposite each other, and from the notches the edge of the flange inclines, as

The shape of the exterior of the case may In case the parts are hinged together, as show n,it will usually be necessary to cut a notch, g, in the flange, as seen in Figs. 3, 4, and 5, to permit the flange to escape the hinge movement, and whereby the said movement 5 seen in Fig. 7, so that the said edge is oblique when the movement is introduced or removed. 60

to the plane of movement, the incline of the I do not wish to be understood as claiming, edge being rearward from the respective broadly, a time-movement constructed so as notches. Upon the inside of the front porto be removably secured in its case bya baytion of the case internally-projecting studs onet or interlocking; joint.

IO f are formed in the same relative position to I claim 6 5 each other as the notches e in the flange F of 1. A clock-case made in two parts, the dithe movement, and so that the movement may vision being in a plane at right angles to the be set into the case, the notches e permitting axis of the case, one of the parts of the case the movement to reach its place of rest in the constructed with radially-projecting studs f case and against the border H inside the upon its inside, combined with a movement 70 glass I, as seen in Fig. 8. This brings the inhaving its front plate provided with a flange clined edge of the flange at the notches below corresponding to the shape of the interior of the studs F, and then a partial rotation of the the case, the edge of the flange adapted to movement will correspondingly turn the rest against the inner surface of the case, the

flange under the studs f until a firm bearing said flange constructed with notches e, corre- 75 is attained, as indicated in Fig. 8, so that the spending in position to the studs f of the case, studs bearing upon the flange serve to hold and the edge of the flange from 'the recesses the movement firmly in the case, and the poinclined to the plane of movement, substansition at which this hearing is reached should tially as described, and whereby the said be such that the figures on the dial'will be in notches permit the flange of the movement to 80 their proper relative position to the supports pass into the case beyond the studs, and then for the case. byapartial rotation of the movement to bring WVhen it is desired to take the movement the inclined edges of the flange under said from the case, a return rotation imparted to studs.

the movement will bring the notches into 2. A circular clock-case made from sheet 85 line with the studs f in the case. Then the metal in two parts, the division being in a movement may be readily taken from the plane at right angles to the axis of the case, case, no other means of securing being necthe one part, A, being the front and the other essary than that which is afforded by the said part, B, the rear part, the front part provided 3 5 flange and the studs in the case. The hinged with a glass, I, and a border, H, resting upon 90 back is given a shape which will cover the the inside of the glass, combined witha movewinding and setting devices, and is preferi inent constructed with a circular flange, F, ably made of a convex shape, as shown, and 1 corresponding in shape to and so as to rest so that it may close upon the case and retain against the interior of the front portion of the 40 its closed position, substantially as the back 1 case, the said flange constructed with two or 5 of a watch-case is closed. l more notches, a, through its edge, and the To wind the clock or set the pointers, it is l edge of the case from the'notches inclined to only necessary to open the back, and easy I the plane of movement, the said front poraccess is had to the pointing or setting del tion of the case provided with studs f, correvices. I spending to the notches in the flange of the 100 be varied to suit the tastes or requirements of the trade, such shape constituting no part of the present invention.

1 have represented the two parts of the case and its flange are removably secured in the case, and also serve to secure the glass and its holding in place, substantially as and for the purpose described.

as hinged together, and this Ipret'er as a mat- 1 r ter of convenience; but it will be understood 1' ALFRED IYRRILL' that they may be removably set together in 1 any convenient or known manner without del parting from the spirit of this invention.

WVitnesses:

WALTER C. CAMP, JOHN J. PHELPS. 

